68708920 has 32 divisors (see below), whose sum is σ = 176680800. Its totient is φ = 23557248.

The previous prime is 68708911. The next prime is 68708953. The reversal of 68708920 is 2980786.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122415 + ... + 122974.

It is an arithmetic number, because the mean of its divisors is an integer number (5521275).

Almost surely, 2^68708920 is an apocalyptic number.

It is an amenable number.

68708920 is an abundant number, since it is smaller than the sum of its proper divisors (107971880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68708920 is a wasteful number, since it uses less digits than its factorization.

68708920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245407 (or 245403 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 68708920 is about 8289.0843885196. The cubic root of 68708920 is about 409.5790245759.

The spelling of 68708920 in words is "sixty-eight million, seven hundred eight thousand, nine hundred twenty".